CC1108ST from Cross chip, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VFB	input	LED drive current setting terminal. Connect an external resistor RFB between this pin and GND to program the constant output current: ILED = VFB / RFB, with VFB typically 150 mV (144-156 mV). Absolute max voltage -0.3 V to 5.5 V.
2	GND	power_in	Ground reference for the device. RFB feedback resistor returns to this pin.
3	DIM	input	PWM dimming control input with built-in 50 kΩ pull-up resistor to internal 5 V rail; may be left floating if dimming is not required (chip outputs maximum current). Logic levels: VIH >= 2.5 V, VIL <= 0.4 V. Absolute max voltage -0.3 V to 5.5 V.
4	VCC	power_in	Power supply input, 2.5 V to 24 V operating range (absolute max -30 V to 28 V). Features reverse-connection protection, with reverse leakage current below 10 uA at VCC = -30 V. For VCC >= 12 V direct-supply applications, a 1 kΩ series resistor is recommended to suppress hot-swap transients.
5	DRV	output	LED drive sink current output. Connects to the cathode of the LED string; sinks up to 200 mA continuous with a saturation drop of only ~175 mV. Absolute max voltage -0.3 V to 32 V. Leakage current below 1 uA when disabled.

Key specifications

Parameter	Value
Manufacturer	Cross chip
Package	SOT-23-5
Category	LED-drv
Pins	5

Ordering variants

Same part, different packaging or reel option.

CC1108ST

CAD (KiCad official)

Symbol: CC1108ST
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Cross chip datasheet (10 pp, sha256 f4fa14d08e0968f2, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF